[U-Boot] [PATCH] video: mxc_ipuv3_fb: stash frame buffer pointer in global data.

Eric Nelson
2014-04-29T21:13:22Z

This patch updates the i.MX video driver to store the
frame-buffer address in the fb_base field of the global
data structure *gd.

By doing this, you can find the frame buffer address
using the 'bdinfo' command:

U-Boot > bdinfo
arch_number = 0x00000EB9
...
FB base = 0x4F35F1C0

This is very useful when debugging display connections.

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
---
drivers/video/mxc_ipuv3_fb.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/video/mxc_ipuv3_fb.c b/drivers/video/mxc_ipuv3_fb.c
index 3e21fb2..08a94c2 100644
--- a/drivers/video/mxc_ipuv3_fb.c
+++ b/drivers/video/mxc_ipuv3_fb.c
@@ -10,9 +10,9 @@
*
* SPDX-License-Identifier: GPL-2.0+
*/
-
#include <common.h>
#include <asm/errno.h>
+#include <asm/global_data.h>
#include <linux/string.h>
#include <linux/list.h>
#include <linux/fb.h>
@@ -24,6 +24,8 @@
#include "mxcfb.h"
#include "ipu_regs.h"

+DECLARE_GLOBAL_DATA_PTR;
+
static int mxcfb_map_video_memory(struct fb_info *fbi);
static int mxcfb_unmap_video_memory(struct fb_info *fbi);

@@ -415,6 +417,7 @@ static int mxcfb_map_video_memory(struct fb_info *fbi)

fbi->screen_size = fbi->fix.smem_len;

+ gd->fb_base = fbi->fix.smem_start;
/* Clear the screen */
memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);

--
1.9.1